Four people have been taken to hospital after at fight at a block of flats in Edinburgh.
Detectives said three women and one man, all in their late teens to early 20s, suffered stab wounds during the incident in Muirhouse Way.
A spokesman for Lothian and Borders Police said the injuries were not life threatening.
The fight happened at about 0500 GMT with a number of police being called as well as three ambulances.
Six people were in the flat and officers confirmed that they were all known to each other.
A Lothian and Borders Police spokesman said: "We are following a positive line of inquiry in relation to the incident."